Improved stone-channelling- machine



etait-rd VIRGIL W. BLANCHARD, 0F BRIDPORT, ASSIGNOR TO HIMSELF AND-A'. J. SEVERANGE, OFY MIDDLEBURY, VERMONT.

Letters Patent No. 99,139, dated January 25, 1870.

The Schedule referred to in these Letters Patent and making part of the name To all whom lit 'may concern:

Beit known that I, VIRGIL W. BLANCHARD, of Bridport, in the county of Addison, and State of Vermont, have invented certain new and useful Improvements in Channelling and Dressing-Machines; and l do hereby declare that the following vis a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference'l marked thereon, which form a partof this specification, in which- Figure l represents a side elevation of my machine.

Figure 2 is a plan view of the same.

In the drawings annexed- Arepresents a platform, with the tongues on its upper surface extending lengthwise of said platform.

B designates a truck, the wheels of which are grooved,to receive the tongues s s, thus enabling the truck to move with the ease required.

C is a sliding bar, held in position by the cleats d d, the said cleats being secured to the outer edge of truck B. I

To the inner side of bar C the rack-bar e is fastened, the oilce of which will-be hereinafter described.

g, in g. 2, represents a spindle, to one end of which is adjusted a spur-wheel, h, and to the other end is secured the pinion t, which gears into the rack-bar e.

n represents a worm-spindle, placed directly beneath spur-wheel h, and gearing into said wheel.

The spindle n is operated by a crank, m.

H is a cylindrical shaft, running parallel with sliding bar C, and confined to the side ot' the truc-k by cleats d d.

Near the up er end of shaft H, the spur-wheel G is adjusted asl ollows:

A groove is cut in shaft H, and a corresponding slot cut in the edge of the hole through which the shaft passes. A wedge being inserted in the slot and groove, the shaft may be raised or lowered, without altering the position of wheel G, which will rest on the surface of the truck-frame. l

L represents a spindle, which passesI vertically through the top ofthe truck-frame B, and is supplied with a spur-wheel, J, which gears into G.

On the upper end of spindle L is a pulley, E, by which the motion is communicated to the channelling-apparatus.

K represents a cylindrical shaft, passing vertically through the truck-frame B, and having near its lower end a spur-wheel,`o, which gears into the rack-bar I on platform lA.

On or near the upper end of shaft K is adjusted the loose pinion V, which gears into wheel J.

a designates a clutch-lever, which'embraces the feathered pulley u on shaft K, and directly above pinion V.

The under side of pulley u is furnished with a tooth, which is designed to enter a slot in pinion V.

When it is desired to arrest the progressive motion of the tool, by means of the clutch-lever a, the said lever will be lowered, so as to relieve the tooth from the slot in V. l

F represents a rectangular level', having its fulcrum at the point z.

The upper end of lever F is connected with pulley E by means of a rod, X. It will be seen that the rod X, in place of being attached to pulley E at its centre, embraces a bolt near the circumference of said pulley, and will give, in its revolutions, a reciprocating motion to lever F.

The horizontal arm of lever F is connected with the piston-rod of pump W, and forces the wat-er through the pipe T, for the purpose hereinafter described.

Y `designates a second pipe, through which the pump W is supplied with water.

It will be remarked that the shaft H and sliding bar C are connected near their lower ends, by means of a metal box, R, which is made to embrace both the shaft and the bar, the said band being made water-tight at bottom.

To the lower end of shaft H is fastened, in any suitable manner, the cutting-apparatus M, in which diamonds, or other material of requisite properties may be used.

In order to soften the rock to be actedon, and also, to remove the dust produced by the channelling-pro cess, a constant flow of water will proceed from pump W, through pipe T, into box R, and then into a cavity in M, from which it will escape througlrsmall holes i, into the channel formed in the rock, and serve the twofold purpose of keeping the cutting-apparatus cool and 4of removing ,the detritus.

In the operation of my machine, the track or platform A, which supports the cutting-apparatus, is to be placed above the stonethat is to be channelled.

Motion will be given to the feed-shaft K, by means of a band from the motive-power to the pulley E ou shaft L.

The wheel J, being on shaft L, will communicate motion to shaft H, tothe bottom of which the channelling-tool M is attached.

As the spur-wheel O is on shaft K, the said wheel will communicate with rack-bar l?, and move the truck to the end of said bar, while the cutting-tool will, by the rapid rotary motion given it by means of the spurwheel G, perform its oilce of channelling the rock.

When the end of the channel is reached, the action of the shaft H, with its tool M, will be arrested by means of clutch-lever a, which, by being lowered at its outer end, will release the .tooth on pulley u from the slot in pinion V,'when the said pinion will revolve loosely around shaft K, and fail to communicate motion to the connecting-wheel J and wheel G, on shaft H.

The next step will be to lower the shaft H, with cutting-tool annexed, for the purpose of deepening the channel. This can be. done by operating the crank m, at the end of worm-spindle n,whicl1, being geared into wheelh on shaft g, will operate pinion t. The said pinion gearing in the rack-bar e, will operate sliding-bar C, and with it shaft H.

lWhen the shaft is lowered sniciently, the pinion V i will again be made to perform its oice, by raising the end of lever a to its original position, and thus render pinion V rigid with 'che shaft K.

By reversing the motion of the Amotive-power', the truck B will be carried back to the point from which it started, and the channel in the rock deepened, by the retrograde action of the tool M. This alternate movement of the truck can be obserred'until the channel is cut to the required depth.

When necessary, two channelling-machines may be used, one on each edge of platform A, with the motivepower placed between.

Having thus described my machine,

What l claim, and desire to secure by Letters Patent, is'- l. A stone-channelling tool, which has a continuons motion, both of rotation on its axis and of progression in the line o f the channel, substantially as and for the purpose set forth.

2. The sliding 'bar C, provided with box R, in combination with the revolving channelling-tool M, operating as described.

3. The sliding bar C, provided with rack-bar e, in combination with pinion t, worm-spindle n,spi1rwheel h, and crank m, all ananged to operate substantially as described.

In testimony that I cla-im the foregoing as my own, I ax my signature, in presence of two witnesses.

VIRGIL W. BLANCHARD.

Witnesses EDWD. MoGovERN, LUTHER SMITH. 

